Sewing-machine bobbin-winder.



M. HEMLEB.

SEWlNG MACHINE BOBBIN WINDER.

APPLICATION HLED AuG.21. 1913.

1,160,604. Patented Nov. 16, 1915.

WITNESSES: INVENTOR J 51 i m I I 777% ATTORNEY CuLuMmA PLANOGRAPH c0-.WASHINGTON D c UNITED TATE PANT FlQE, f

MARTIN I-IEML EB, OF ELIZABETH," NEW JERSEY, ASSIGNOR TO THE SINGERMANUFAC- TURINGCOIVIPANY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE BOBBIN-WINDER.

Specification of Letters Patent.

Application'filed August 21, 1913. Serial No. 785,844.

To all whom/it may concern Be it known that I, MARTIN HnMLnB, a citizenof the United States, reslding at Elizabeth, in the county of Union andbtate of New Jersey, have invented certain new and useful Improvementsin Sewing-Machine Bobbin-Winders, of which the following is aspecification, reference being had therein to the accompanying drawings.My invention relates to bobbin-winding devices for sewing machines, andmore particularly to devices of this character adapted to be driventhrough direct contact with the balance-wheel of a sewing machine, theobject of the invention being to improve the construction subject ofpatent to Me- Farlane. No. 961,151! of June 14;, 1910, while retainingthe substantial elements thereof.

Inthe present construction, the bobbinspindle and driving-wheel of thebobbinwinding attachment are carried by a swinging arm mounted by meansof a fulcrum stud upon a belt guard overhanging the grooved hub of thebalance-wheel, a runway being formed upon the hub to transmit mo tion tothe bobbin-driving wheel. Upon said fulcrum stud, and intermediate theswinging arm and the belt guard, is mounted a lever which carries aspring-pressed latch hook. The swinging spindle-carrying arm isspring-pressed upwardly from the runway and is held in its operativeposition against the stressof said spring by the latch hookthe latterautomatically releasing said arm at the end of the bobbin-windingoperation, thus permitting the arm to carry the driving-wheel out ofcontact with the runway. While the latch holds the arm and itsdriving-wheel in operative position, the arm and the latch carryinglever are locked together, and the" thrust of a spring inter posedbetween the lever and the belt-guard is transmitted to said arm,wherebythe nonresilient rim of the driving-wheelie springpressed againstthe face of the runway.

The McFarlane construction, "subject of the patent above referred to,employs the elements just described, with the exception that a rubberrini'is used for the "driving wheel and driving contact between thelatter and the runway depends entirelyfupon the resiliency of saidrubber rimthe latch carrying lever being maintained in fixed positionexcept during adjustment. 'In attachments of the type illustrated bytheMcFarlane patent above referred to, the use of the resilient rim uponthe bobbin-driving wheel renders the efi'ectiveness of the attachmentdependent upon the continued resiliency and form of the rim. The rimmust be highly resilient, must retain its form, and must offerresistance to wear. The only practical material which possesses theabove character- I istics' is rubber, but rubber is objectionablebecause it quickly becomes oxidized under certain atmosphericconditions, and it is affected by the oil used upon the attachment andupon the sewing machine. In the present invention the bobbin may bedriven by j a wheel having a Wear-resistant, non-resilient rim, such assteel, indurated fiber, or compressed felt, inasmuch as sprang-pres sureis applied to the wheel, as hereinbefore pointed out.

In the McFarlane construction it'is impossible to provide the lever witha spring Patented Nov. 1e, was. I

to thrust the driving wheel into spring contact with the runway, becausesuch spring would render the latch ineffective. The disengagement of thelatch from thespindlecarrying arm wouldpermit the lever to springdownward while the arm would remain stationary, the wheel maintainingits contact with the-runway. And a stop device, employed to preventdownward move ment of the lever after release of the arm, would renderthe spring ineffective, the thrust of the latter being held by such stopdevice. In the latter case the driving-wheel after being brought intocontact with the runway, would be held by the latch against, the'stressof the spring of the swinging arm; but, should the driving-wheel rim beformed of non-elastic resistant material, the contact would beinefiective to transmit the necessary motion. I s p In the presentinvention, the latch carry I ing lever is given a downward thrust by aspring as aforesaid, and a stop is provided for limiting the downwardmovement of the lever, whereby the spindle carrying arm, upon itsrelease by the latch is'permitted to move upward to carrythe'driving-wheel out of contact with the runway. "In throwing theattachment into operative position,

lever upwardly 7 against the stress of its spring and away from thestop, the spindles a lever finger-piece is depressed to move-thecarrying arm being held in its inoperative position by a stop device.When the upward movement of 7 the lever carries the spring-latchintoposition to, lockthearin and lever together,.pressure upon the finger,-

piece of the lever is discontinued and the lever is permitted to movethe arm downwardly thereby carrying the driving-wheel into contact "withthe runway against the face of which it is pressed by the lever spring.7

In h ec empany e' d wi s, li r is a front, sideelevation of the bohhin-wind; ing in operativerelation with a sewing machine balancewheel, the support ing shaft rand bearing therefor aiiorded by thesewingmachine frame ,being in transverse section. [Fig. 2 side yieyv of theparts represented ,iiLIfi'g.v lshowing a por: tion of thebalanc'e-wheel'and the belt-guard infsec'tion; Fig. 3 is ia s partialside elevation, of the part shows in Fig, l with the bobbin-winder inretracted position. A Figs 1s atransverse section of the belt-guard theswinging arm vwhich carries the dr vlng wheel, and th e latch carryinglever, "showing the relationof such 'pa rtsi and the tensionspringstherefor.

At the rear end of the sewingfinachiiie standard '1 is formeda bearingboss Zircontaininga bushingv 3. securedin said boss by set-screw & and'afio'rd'ing ahea'ringffor the main-'shaftb upon, the rearwar end "ofwhich is mounted balance-wheelfi. The balance wheel isproyided with theusualannularf'groove 7 tofreceive the driving belt, and

with a cylindrical portion ,8 adjacent "said groove to afford a runwayfor the driving wheeloif the bobbirtwi'nder. e

Overhanging the ba'lance-wheelfhub is a segmental belt-guard, 9provid'ed with a seg formedot steel, indurated fiber,.or other assistant material' The rearwardbearing boss 15 of: tllqswingiug 211111114 overhangs the belt'groove 'Z of the balance wheel (handthe drivingwheel of the attachment is thus disposed suitably for securing itscontact with the yrm iay 8 0f said balancewheel. The

pp s e bfl he p le 16 p oie b yond the corresponding bearing boss '15 toreceive '2 the usual disk-bobbin 18 to; which the thread guided bymeansofnotched vibrating arm 19 of arock-lever fulcrumed by means o fscre wi-stud 20 upon the lateralear ioftinextension 21 formed uponing-arm 14;. The rock-lever is provided with a second arm 22, engagingactuating-cam 2-3 upon the worm-wheel 24 pivotallymounted by; means ofastud25 upon said extension 21,

of swinging-arm lit and meshing with worm 26 -fixed upon therotary-spindle l6.

mounte 'ija lioolied l'atch '32 having an angur larly a ranged 'hQde3mv1ith a notch "34 in its opposite end, ada o ted to engage a pointed"or tooth '35. upon the. swinging'spindlecarrying arm 14:. The latch 32is proa vided with an 'angularly arranged arm 32* normally disposedladjlacent the bobbin 'receivinf'gfend of the spindle and adapted to beengaged by lthe thread for releasing the latch, when thehobbinwindingoperation is fl fi i nz we u wn m nn r- 1 1 cling studaperture31 of the offset "portion 30 of the latch carrying lever is anannular c11aniber36ffor housing a coiled spring,the latter having oneend securedin an aperture 37in said 'cham ber and its opposite endsecuredin apertur formed the bottom of Y a housing chamber "36*surrounding the fulcrum pin aperture ofthefl atch where i byth e latchisspr'iiig-pressed "toward the tooth ore lug 3 5 of the swinging spindlecarryin'g a'rinl k y V v V The hub 13fof the 'arm 14 is formed with anannular chamber l3 fforhousing a coiled springpone end of the latterbeing secured in an aperture in the bottom of said'ch'amberjand theother enaextendin outwardly throughfa lateral opening therein forengagement with the offset portion 30 of the latchcarryingllever,whereby the arm l lis spring-pressed upwardly toward itsinoperativeposition 'uponlrjelease oflatch 32. p I

Encircling the aperture fo'rmed in the latchecarrying lever to receives'jtu'd 12, is an ioo 40 one end of which is; secured in an apertiire'formed in leverfafiid the opposite entl is secured in an aperture in thebottom ofihe mu in cg ha ii 138*; o e it e, f l guard 9,,gi her y t el-c ry fi eYs 'f l spring-pressedftoforce spindle-carrying arm w ifidtliir fiir yu i b 5 1 7 when the latchcarriefd'by said leyer is thrown iengag ment with the tooth "Or lug 35 {of stre m 1'4.

In 1, thefparts iba hey l s lms whe 'driv nsrw ion ing-wheel l7; firmlyupon the runway 8 to 35 is released and spring-pressed arm l i is.

permitted tospring upwardly until the point of the lug is arrested byengagement with the outer face of the notch 3d of the latch,

the parts reaching the position shown in Fig,

3. In such position the'driving-wheel 17 is held out of engagement withannular; runway 8 of the balance-Wheel, and the downward movement oflever 27 under action of spring 40 is preventedby stop-lug 41 formedupon the flange of belt-guard 9. g

The parts being in inoperative position, it will be'seen by reference toFig. 3 of the drawings that pressure upon the spindle carrying arm 14 ata point above the'spindle 16 will move the, arm downwardly against thestress of itsflspring until the driving wheel is brought intoengagement'with the runway 8. During suchmovement of arm leithelatch-carrying lever is held against movementby stop-lug l1, and itwill be seen that/arubber rim upon the driving-Wheel might yieldsufliciently to permit latch .32 to lock the driving-wheel in suchoperative position. In such case, however, the contact between thedriving-wheel 17 with runway 8 would be secured solely by virtue of therubber rim, the action of spring .40 being rendered ineffective bystop-lug tl. Toobviate the necessity of using aresilient driving-wheelrim and to transmit the pressure of spring 40 to driving-wheellZ, whenthe latter is in operative position, the present; construction comprisesmeans for locking together the latch-carrying lever and thespindle-carrying arm while the latter is in its upper or inoperativeposition- It will be seen from inspection of Fig. 3 of the drawings, inwhich the driving-wheel is shown in inoperative position, that pressureupon the finger-piece 28' of theleVerI27 will cause the offset portionof said lever to rise, the spindle carrying arm 14 likewise rising untillug 42 at the rear of said. arm comes into contact with seat 4-3ontheflange of the belt guard. .As the offset portion of lever 27continues to rise above stop-lug 41, the notched face of latch 32 iscarried beyond lug 35 of spindle-carrying arm 14 and, under the actionof its spring, the latch is thrown over the upper face of said lug thuslocking the arm and the lever together. When the lever finger-piece isreleased, the action of lever-spring 40 will carry the parts into theoperative position shown in Fig. 1.

It will be observed that according to the present improvement thedriving wheel for the bobbin-supporting spindle is sustained by theswinging arm supporting said spindle said balance-wheel.

yieldingly in operative relation with f the sewing machine balance-wheelwhich actuates the spindle through said driving wheel," or yieldingly ininoperative relation withwheel isthus a floating element when disposedin either its initial retracted position v or in itsoperative positioninwhich latter its resilient mounting enables it to maintain its rollingcontactor driving relation with the runway of the balance-wheel.

In my pending application Serial No.

857,291, filed Augustl8, 1914, the improve I mentis shown embodied in adevice wherein the drivingwheel has a resilient connection withthespndle, both of these elements belng mounted upon the spring-retractedswinging arm. In either embodiment, how

ever, a. resilient connection is provided be tween the driving wheel andthe stud upon wh ch the latch for the swinging arm is mounted, so that,notwithstanding the positive engagement of the latch with the armcarrying thedriving wheel, the latter maintains its yielding contactwith the runway of the balancewheel, the face of the driving wheel ineach embodiment being substantially inelastic in orderthat the effectiveness of. the rolling contact shall not'be dependent uponthe elasticityof a substance which deteriorates with age or constant use, such as therubber ring which has been customarily employed heretofore to provideresiliency in the operative connection between the driving wheel .of thebobbinwinder and the, sewing machine balance Wheel. 7

Having thus set forth the nature of the invention, what I claim hereinis 1. rLbobbin-winder comprising a swinging arm, abobbin-supportingspindle sustained thereby, a-spring applied to said arm and adapted Thespindle driving I to hold it yieldingly in an initial position, adriving wheel having a substantially inelastic face adapted to roll incontact withyan actuating element for imparting, rotary movements tosaid spindle, a latch adapted for engagement with said arm to'hold itdisplaced from said initial position, a fulcrum-stud for said latch, anda resilient connection between said stud and the driving wheel wherebythe latter is sustained inyielding relation with said stud.

2. A bobbin-winder comprising a swinging arm sustaining abobbin-supporting spindle and a driving wheel therefor, a swinging leveradjacent said arm, a detachable coupling for. connecting said arm andlever to move in unison, a spring applied to said arm for holdingityieldingly in an ini tial position, and a spring applied to said leverand adapted to act upon said arm through said coupling oppositely to thefirstnamed springand to overcome the stress of the same for holding saidarm in operative necting said lever to the *arm whereby the positiondisplaced from said initial position wherein it'is adapted to yieldbodily.

3.=A bobbin-winder comprising a swinging arm, a spindle and a drivingWheel therefor carried by said arm, a spring for maintaining said arm inan initial position,

a la tchcarrying lever, a spring-pressed.

latch carried by said lever and adapted for engagement with said arm,and a spring ap plied to said lever and acting in opposition to andadapted to overcome the stress'of the first-named spring-- to yieldingly,maintaiu said swinging armdisplacedfrom its initial position. f

"spring applied to said arm," means for 'conin and a balance wheelthereon provided with an annularrunway, of a'bobbin winder ,ccmprising aswingingarm, a spindle and a driving wheel therefor-carried by said arm,a springfor maintaining the arm in position'to hold said driving-wheelout ofcon tact with said runway, a lever spring pressed in opposition tosaid arm, means for transmitting the spring pressure of said lever tothe arm whereby the'latter-is moved in opposition to its spring and thedrivingwheel is spring-pressed against the runway,

and automatically' acting means for releas ingthepressure of saidleverfrom said arm at the completion of the bobbin-winding operation. i 6.The combination with a sewinginachine frame, a rotary shaft journaledtherein s and. a :balance-wheei thereon provided with an annular runway,of a bobbin-' winder provided with a rotary spindle, a

I copies'of this natent'znay ;be obtained for five cents each; byaddressingthe Commissioner of .Iatents, I

l. Abobbin-winder comprisinga swing "ingfar m, a spindle and a drivingwheel therefor carriedby said arm, a spring for maintaining the arm in agiven -"'position, a

lever spring-pressed in opposition to the the action of the boblast-teafriction-wheel mounted on said spindle,f a

swinging arn'i' carrying said spindle and frictlon-wheel, a spring formaintaining the arm normally in inoperative po'sitionto hold said isition whereby the pressure :of said latch-* lever'spring will carry thedriving wheel into spring contact with said runway, and automaticallyacting means for releasing said swin ing armat'the completion of abobbin winding operation. 1

7; The combination with a sewing ma- 7 chine frame, a rotary shaftjournaled therein and a balance-wheel thereon provided with anannularrunway, of a bobbin-winder supported by said frame andprovidedwith a rotary -sp'indle, a' friction-wheel mounted on saidspindle, a spring-pressed swinging arm-adapted to support said spindleand friction-wheel andto'r maintain the latter" normally out of contactwith; said runway,-

spring, the stopcto carry said; latch into engagement with the swingingarm whereby 'the pressure of said lever-spring is transmitted.

WashingtonQD. C, 7

means for limiting the movement of said arm under its spring, alatch-lever, andla latch adapted to engage said-swinging-arm, a springfor pressing said latch-lever in opposition to the swinging arm, a stopfor 11111- iting themovementof said lever under its means formoving saidlever from HEMLEB. f

